Search results for: Caspase 1 Inhibitor Z YVAD FMK
#28984290 2017/10/06 Save this To Up
Role of autophagy in oncolytic herpes simplex virus type 1-induced cell death in squamous cell carcinoma cells.Herpes simplex virus type 1 (HSV-1) is one of the most widely studied viruses for oncolytic virotherapy. In squamous cell carcinoma (SCC) cells, the role of autophagy induced by neurovirulence gene-deficient HSV-1s in programmed cell death has not yet been elucidated. The oncolytic HSV-1 strain RH2, which lacks the γ34.5 gene and induces the fusion of human SCC cells, was used. RH2 replicated and induced cell death in SCC cells. RH2 infection was accompanied by the aggregation of microtubule-associated protein 1 light chain 3 (LC3) in the cytoplasm, the conversion of LC3-I to LC3-II and the formation of double-membrane vacuoles containing cell contents. No significant changes were observed in the expression of Bcl-2 or Bax, while a slight decrease was observed in that of Beclin 1. The autophagy inhibitors, 3-methyladenine (3-MA) and bafilomycin A1, did not affect viral replication, but significantly inhibited the cytotoxicity of RH2. The caspase-3 inhibitor z-DEVD-fmk and caspase-1 inhibitor z-YVAD-fmk also reduced the cytotoxicity of RH2. These results demonstrated that γ34.5 gene-deficient HSV-1 RH2 induced autophagic cell death in SCC cells as well as pyroptosis and apoptosis.Cancer Gene Therapy advance online publication, 6 October 2017; doi:10.1038/cgt.2017.33.
2739 related Products with: Role of autophagy in oncolytic herpes simplex virus type 1-induced cell death in squamous cell carcinoma cells.Lung squamous cell carcin Cervix squamous cell carc Esophagus squamous cell c Esophagus squamous cell c Esophageal squamous cell Esophagus squamous cell c Esophageal squamous cell Oral cavity squamous cell Skin squamous cell carcin anti HSV (II) gB IgG1 (mo anti HCMV IE pp65 IgG1 (m anti HCMV gB IgG1 (monocl
#28295583 2017/03/15 Save this To Up
Ameloblastin Upregulates Inflammatory Response Through Induction of IL-1β in Human Macrophages.Ameloblastin (AMBN) is an enamel matrix protein that has various biological functions such as healing dental pulp and repairing bone fractures. In the present study, we clarified the effect of AMBN on the expression of an inflammatory cytokine, interleukin-1β (IL-1β) in lipopolysaccharide (LPS)-treated human macrophages. Real-time RT-PCR analysis showed that LPS treatment upregulated expression of the IL-1β gene in U937 cells. Interestingly, AMBN significantly enhanced IL-1β gene expression in LPS-treated U937 cells as well as the secretion of mature IL-1β into culture supernatants by these cells. AMBN also activated caspase-1 p10 expression in LPS-treated U937 cells. Pretreatment with a caspase-1 inhibitor, Z-YVAD-FMK, downregulated the mature IL-1β expression enhanced by AMBN treatment in LPS-treated U937 cells. A co-immunoprecipitation assay showed that treatment with LPS and AMBN upregulated toll-like receptor 4 (TLR4) and myeloid differentiation primary response gene 88 (MyD88) interactions, but there was no significant difference compared with LPS treatment alone in U937 cells. In contrast, western blot analysis revealed that AMBN remarkably prolonged the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2), a member of the mitogen-activated protein kinase (MAPK) family. An ERK1/2-selective inhibitor, U0126, suppressed expression of the IL-1β gene as well as its protein expression in U937 cells treated with LPS and AMBN. Taken together, these results indicate that AMBN enhances IL-1β production in LPS-treated U937 cells through ERK1/2 phosphorylation and caspase-1 activation, suggesting that AMBN upregulates the inflammatory response in human macrophages and plays an important role in innate immunity. J. Cell. Biochem. 118: 3308-3317, 2017. © 2017 Wiley Periodicals, Inc.
1595 related Products with: Ameloblastin Upregulates Inflammatory Response Through Induction of IL-1β in Human Macrophages.CELLKINES Natural Human I Human Interleukin-4 IL-4 Human Interleukin-6 IL-6 Human Interleukin-7 IL-7 Human Interleukin-2 IL-2 Human Macrophage Inflamma Human Macrophage Inflamma Human Macrophage Inflamma Human Interleukin-16 IL-1 Human Interleukin-33 IL-3 Human Macrophage Inflamma Human Interleukin-17E (IL
#27643624 2016/09/19 Save this To Up
Role and Association of Inflammatory and Apoptotic Caspases in Renal Tubulointerstitial Fibrosis.Caspases, an evolutionary conserved family of aspartate-specific cystein proteases, play pivotal roles in apoptotic and inflammatory signaling. Thus far, 14 mammalian caspases are identified and categorized into 3 distinct sub-types: inflammatory caspases, apoptotic initiator and apoptotic executioner. Caspase-1 is an inflammatory caspase, while caspase-7 belongs to apoptotic executioner. The roles and association of these two distinct types of caspases in renal tubulointerstitial fibrosis (TIF) have not been well recognized.
1033 related Products with: Role and Association of Inflammatory and Apoptotic Caspases in Renal Tubulointerstitial Fibrosis.Human Macrophage Inflamma Human Macrophage Inflamma Human Macrophage Inflamma Human Macrophage Inflamma Human Macrophage Inflamma Human Gro g Macrophage In Androgen Receptor (Phosph Androgen Receptor (Phosph Rabbit Anti-Human Androge Rabbit Anti-Human Androge Mouse Macrophage Inflamma Mouse Macrophage Inflamma
#26987291 2016/04/13 Save this To Up
Immunogenic cell death by oncolytic herpes simplex virus type 1 in squamous cell carcinoma cells.Molecules essential for the induction of immunogenic cell death (ICD) are called damage-associated molecular patterns (DAMPs). The effects of oncolytic herpes simplex virus type 1 (HSV-1) on the production of DAMPs were examined in squamous cell carcinoma (SCC) cells. The cytopathic effects of HSV-1 RH2 were observed in mouse SCCVII cells infected at a high multiplicity of infection (MOI), and the amounts of viable cells were decreased. After being infected with RH2, ATP and high mobility group box 1 (HMGB1) were released extracellulary, while calreticulin (CRT) translocated to the cell membrane. A flow-cytometric analysis revealed an increase in the number of annexin-V and propidium iodide (PI)-stained cells; and the amount of cleaved poly (ADP-ribose) polymerase (PARP) was increased. The killing effect of RH2 was reduced by pan-caspase inhibitor z-VAD-fmk and the caspase-1 inhibitor z-YVAD-fmk, suggesting the involvement of apoptosis and pyroptosis. In C3H mice bearing synergic SCCVII tumors, the growth of tumors injected with the supernatant of RH2-infected cells was less than that of tumors injected with phosphate-buffered saline (PBS). These results indicate that oncolytic HSV-1 RH2 produces DAMPs from SCC cells to induce cell death. This may contribute to the enhancement of tumor immunity by oncolytic HSV-1.
2416 related Products with: Immunogenic cell death by oncolytic herpes simplex virus type 1 in squamous cell carcinoma cells.Lung squamous cell carcin Cervix squamous cell carc Esophagus squamous cell c Esophagus squamous cell c Esophageal squamous cell anti HCMV IE pp65 IgG1 (m anti HCMV gB IgG1 (monocl Macrophage Colony Stimula Sf9 insect cells Sf21 insect cells superSf9-1 insect cells superSf9-2 insect cells
#26116704 2015/10/02 Save this To Up
IL-1β production is dependent on the activation of purinergic receptors and NLRP3 pathway in human macrophages.The Nod-like receptor family protein 3 (NLRP3)-inflammasome pathway is known to be activated by danger signals such as monosodium urate (MSU). We investigated the role of P2 purinergic receptors in the activation of NLRP3-inflammasome pathway after MSU treatment of primary human monocyte-derived macrophages (MDMs). After initial stimulation with a low concentration of LPS (0.1 µg/ml), a 6 h treatment with MSU crystals (250, 500, and 1000 µg/ml) induced the MDMs to release IL-1β, IL-1α, and IL-6 in a dose-dependent manner. Moreover, the caspase 1 inhibitor Z-YVAD-FMK and the cathepsin B inhibitor CA-074Me reduced production of IL-1β in a dose-dependent manner after LPS + MSU treatment. We used real-time reverse transcription-quantitative PCR to show that treatment with LPS and MSU (500 µg/ml) induced significantly greater expression of NLRP3 and IL-1β than after treatment with LPS. We also found that MSU treatment induced P2X purinergic receptor 7 (P2X7R) mRNA and protein expression. Furthermore, addition of the P2X7 purinergic receptor antagonist A-740003 significantly impeded IL-1β production and pro-IL-1β cleavage after treatment with LPS + MSU. Remarkably, RNA silencing of P2X7R (but not P2X4R) inhibited the release of IL-1β and other M1 macrophage cytokines (such as IL-1α, IL-6, and TNF-α) from MDMs stimulated with LPS + MSU. Taken as a whole, our results show that P2 purinergic receptors and the NLRP3 inflammasome pathway are involved in the secretion of IL-1β from MSU-stimulated human macrophages. This pathway may constitute a novel therapeutic target for controlling the inflammatory process in several associated pathologies.
2593 related Products with: IL-1β production is dependent on the activation of purinergic receptors and NLRP3 pathway in human macrophages.Anti AGO2 Human, Monoclon Anti AGO2 Human, Monoclon CELLKINES Natural Human I Human Interleukin-4 IL-4 Human Interleukin-6 IL-6 Human Interleukin-7 IL-7 Human Interleukin-2 IL-2 Human Interleukin-16 IL-1 Human Interleukin-33 IL-3 Human Interleukin-17E (IL Human Interleukin-32 alph Human Interleukin-17F IL-
#25181346 2014/09/29 Save this To Up
High-temperature calcined fullerene nanowhiskers as well as long needle-like multi-wall carbon nanotubes have abilities to induce NLRP3-mediated IL-1β secretion.Because multi-wall carbon nanotubes (MWCNTs) have asbestos-like shape and size, concerns about their pathogenicity have been raised. Contaminated metals of MWCNTs may also be responsible for their toxicity. In this study, we employed high-temperature calcined fullerene nanowhiskers (HTCFNWs), which are needle-like nanofibers composed of amorphous carbon having similar sizes to MWCNTs but neither metal impurities nor tubular structures, and investigated their ability to induce production a major proinflammatory cytokine IL-1β via the Nod-like receptor pyrin domain containing 3 (NLRP3)-containing flammasome-mediated mechanism. When exposed to THP-1 macrophages, long-HTCFNW exhibited robust IL-1β production as long and needle-like MWCNTs did, but short-HTCFNW caused very small effect. IL-1β release induced by long-HTCFNW as well as by long, needle-like MWCNTs was abolished by a caspase-1 inhibitor or siRNA-knockdown of NLRP3, indicating that NLRP3-inflammasome-mediated IL-1β production by these carbon nanofibers. Our findings indicate that the needle-like shape and length, but neither metal impurities nor tubular structures of MWCNTs were critical to robust NLRP3 activation.
1195 related Products with: High-temperature calcined fullerene nanowhiskers as well as long needle-like multi-wall carbon nanotubes have abilities to induce NLRP3-mediated IL-1β secretion.Human Antithrombin III to Human Plasminogen Total A Total Human tPA Functiona Total Human uPA Antigen A Human Vitronectin Total A Mouse Factor X total anti Total Mouse PAI-1 Antigen Mouse Plasminogen Total A Total Mouse tPA Antigen A Total Mouse uPA Antigen A Mouse Vitronectin Total A Rat PAI-1 total antigen a
#25136295 2014/08/19 Save this To Up
Role of mitochondria ROS generation in ethanol-induced NLRP3 inflammasome activation and cell death in astroglial cells.Toll-like receptors (TLRs) and NOD-like receptors (NLRs) are innate immunity sensors that provide an early/effective response to pathogenic or injury conditions. We have reported that ethanol-induced TLR4 activation triggers signaling inflammatory responses in glial cells, causing neuroinflammation and brain damage. However, it is uncertain if ethanol is able to activate NLRs/inflammasome in astroglial cells, which is the mechanism of activation, and whether there is crosstalk between both immune sensors in glial cells. Here we show that chronic ethanol treatment increases the co-localization of caspase-1 with GFAP(+) cells, and up-regulates IL-1β and IL-18 in the frontal medial cortex in WT, but not in TLR4 knockout mice. We further show that cultured cortical astrocytes expressed several inflammasomes (NLRP3, AIM2, NLRP1, and IPAF), although NLRP3 mRNA is the predominant form. Ethanol, as ATP and LPS treatments, up-regulates NLRP3 expression, and causes caspase-1 cleavage and the release of IL-1β and IL-18 in astrocytes supernatant. Ethanol-induced NLRP3/caspase-1 activation is mediated by mitochondrial (m) reactive oxygen species (ROS) generation because when using a specific mitochondria ROS scavenger, the mito-TEMPO (500 μM) or NLRP3 blocking peptide (4 μg/ml) or a specific caspase-1 inhibitor, Z-YVAD-FMK (10 μM), abrogates mROS release and reduces the up-regulation of IL-1β and IL-18 induced by ethanol or LPS or ATP. Confocal microscopy studies further confirm that ethanol, ATP or LPS promotes NLRP3/caspase-1 complex recruitment within the mitochondria to promote cell death by caspase-1-mediated pyroptosis, which accounts for ≈73% of total cell death (≈22%) and the remaining (≈25%) die by caspase-3-dependent apoptosis. Suppression of the TLR4 function abrogates most ethanol effects on NLRP3 activation and reduces cell death. These findings suggest that NLRP3 participates, in ethanol-induced neuroinflammation and highlight the NLRP3/TLR4 crosstalk in ethanol-induced brain injury.
1275 related Products with: Role of mitochondria ROS generation in ethanol-induced NLRP3 inflammasome activation and cell death in astroglial cells.anti HSV (II) gB IgG1 (mo anti HCMV IE pp65 IgG1 (m anti HCMV gB IgG1 (monocl Jurkat Cell Extract (Indu Jurkat Cell Extract (Indu Jurkat Cell Extract (Indu Jurkat Cell Extract (Indu Macrophage Colony Stimula Macrophage Colony Stimula Cell Meter™ Fluorimetri Cell Meter™ Fluorimetri GLP 1 ELISA Kit, Rat Gluc
#24357806 2013/12/20 Save this To Up
Oligomeric amyloid β induces IL-1β processing via production of ROS: implication in Alzheimer's disease.Alzheimer's disease (AD) is a chronic neurodegenerative disease characterized by progressive neuronal loss and cognitive decline. Oligomeric amyloid β (oAβ) is involved in the pathogenesis of AD by affecting synaptic plasticity and inhibiting long-term potentiation. Although several lines of evidence suggests that microglia, the resident immune cells in the central nervous system (CNS), are neurotoxic in the development of AD, the mechanism whether or how oAβ induces microglial neurotoxicity remains unknown. Here, we show that oAβ promotes the processing of pro-interleukin (IL)-1β into mature IL-1β in microglia, which then enhances microglial neurotoxicity. The processing is induced by an increase in activity of caspase-1 and NOD-like receptor family, pyrin domain containing 3 (NLRP3) via mitochondrial reactive oxygen species (ROS) and partially via NADPH oxidase-induced ROS. The caspase-1 inhibitor Z-YVAD-FMK inhibits the processing of IL-1β, and attenuates microglial neurotoxicity. Our results indicate that microglia can be activated by oAβ to induce neuroinflammation through processing of IL-1β, a pro-inflammatory cytokine, in AD.
2897 related Products with: Oligomeric amyloid β induces IL-1β processing via production of ROS: implication in Alzheimer's disease.Beta Amyloid (42) ELISA K Beta Amyloid (1 40) ELISA Beta Amyloid (40) ELISA K Beta Amyloid (1 40) ELISA Integrin β1 (CD29) Antib Anti 3 DG imidazolone Mon rHIV gp36, soluble Antige rHIV gp41, soluble Antige Liver disease spectrum ti Lung disease spectrum tis Colon disease spectrum ti Rectum disease spectrum (
#23017228 2012/10/29 Save this To Up
Differential activation of the inflammasome in THP-1 cells exposed to chrysotile asbestos and Libby "six-mix" amphiboles and subsequent activation of BEAS-2B cells.Inflammatory responses of THP-1 cells (macrophage cell line) exposed to chrysotile asbestos (Chry) and Libby six-mix (LIB) and the subsequent impact on bronchial epithelial cells were determined. Direct treatment of THP-1 cells with Chry caused cell death, activation of caspase-1 and release of IL-1β, while the addition of caspase-1 inhibitor, Z-YVAD-FMK, reduced IL-1β, suggesting that Chry activated the caspase-1 mediated Nod-like receptor protein 3 (NLRP3) inflammasome; by comparison, LIB had less effects on all of these parameters. Expression of antioxidant enzymes, protein oxidation and nitration, and lipid peroxides in THP-1 cells treated with the two particles suggest that LIB generated more reactive oxygen species (ROS) than the same dose of Chry. Differences in fiber length and surface area suggest a possible role for particulate size in the differential activation of the inflammasome. BEAS-2B cells, representing the bronchial epithelium, treated with supernatants of medium from Chry- or LIB-treated THP-1 cells (conditioned medium) activated the MAPK cascade, increased phosphorylation of ERK and Cot (MAP3K8), increased AP-1 binding activity and induced IL-6 release. To verify that IL-1β from THP-1 cells was responsible for activation of BEAS-2B, conditioned medium with added IL-1Ra, an IL-1β antagonist, was applied to BEAS-2B. Results show that IL-1Ra attenuated effects of conditioned medium, supporting a role of IL-1β, as a secondary mediator, in the transduction of inflammatory signaling from the macrophage to epithelial cells. The effects of LIB-conditioned medium appeared to be less dependent on IL-1β. In conclusion, Chry and LIB induce differential inflammatory responses in THP-1 cells that subsequently lead to differential effects in epithelial cells.
1953 related Products with: Differential activation of the inflammasome in THP-1 cells exposed to chrysotile asbestos and Libby "six-mix" amphiboles and subsequent activation of BEAS-2B cells.anti HCMV IE pp65 IgG1 (m anti HCMV gB IgG1 (monocl Macrophage Colony Stimula Sf9 insect cells Sf21 insect cells superSf9-1 insect cells superSf9-2 insect cells superSf9-3 insect cells (R,R)-N-(2-Amino-1,2-diph AccuzolTM Total RNA Extra Nile Red, A lipophilic dy Rat monoclonal anti mouse
#15274298 2004/07/27 Save this To Up
Caspase-1 enhances the apoptotic response of prostate cancer cells to ionizing radiation.The significance of caspase-1 in prostate cancer has recently been documented (Cancer Res 61: 1227-1232, 2001). In this study, we investigated the role of caspase-1 in radiation-induced apoptosis in order to identify the significance of this apoptotic initiator in radiation resistance.
1297 related Products with: Caspase-1 enhances the apoptotic response of prostate cancer cells to ionizing radiation.Top 4 types of cancer (co Primary antibody Caspase Primary antibody Caspase Top five cancer tissue ar AccuzolTM Total RNA Extra Top 10 cancer tissue arra Prostate cancer tissue ar High density (114 cases 2 Prostate cancer test tiss Multiple prostate cancer Prostate cancer tissue ar Prostate cancer and norma
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